* Turn the P3424WEB off

* Place a soft towel on the desktop
* Lay the P3424WEB panel side down on the soft towel

* Disconnect the Stand base and Stand riser from the rear of the P3424WEB

* Turn the Stand base over annd verify that it is secure in place with the Stand riser

* Place the Stand base and Stand riser upright on the desktop
* Does the square bracket appear level? If not, is there any left or right twist available to level it?

"But I just had to push it hard."

So the slant issue was corrected?

Yes it corrected.  

Thanks for your response.